The testers were stunned by the performance of the aluminum Fortress model FX-37. It held over 7,200 lbs., which was 3,000 lbs. greater than the second best anchor in the test. Just as astonishing was the fact that the 22 lb. Fortress FX-37 was 30% lighter in weight. The crew determined that its holding power was similar to what would be needed by a 40' yacht during a hurricane.